/*
 * JsonRpcServletConfig
 *
 * Copyright Aldrin Edison Baroi 2006
 *
 * Aldrin Edison Baroi <aldrin91011@yahoo.com>
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 *
 */
package org.charless.spring.jsonrpc;

import java.util.Enumeration;
import java.util.HashMap;
import java.util.Map;
import javax.servlet.ServletConfig;
import javax.servlet.ServletContext;
import com.metaparadigm.jsonrpc.JSONRPCServlet;
import cx.ath.choisnet.util.iterator.IteratorHelper;

/**
 * JSON-RPC servlet is not configured using web.xml and ServletConfig provided
 * by the container is immutable. JsonRpcServletConfig wraps ServletConfig
 * provided by the container and adds JSON-RPC servlet specific configuration
 * information.
 *
 * @author Aldrin E Baroi
 *
 */
public class JsonRpcServletConfig implements ServletConfig
{
    private final JsonRpcServletContext jsonRpcServletContext;
    private final String servletName;
    private final Map<String,String> initParameters;

    /**
     *
     */
    public JsonRpcServletConfig(JsonRpcServletContext jsonRpcServletContext,
            ServletContext servletContext)
    {
        super();
        this.jsonRpcServletContext = jsonRpcServletContext;
        this.servletName = JSONRPCServlet.class.getName();
        this.initParameters = new HashMap<String, String>();
        Enumeration<?> e = servletContext.getInitParameterNames();
        while (e.hasMoreElements())
        {
            String key = (String) e.nextElement();
            String val = servletContext.getInitParameter(key);
            this.initParameters.put(key, val);
        }
        // Disabling auto session bridge creation, since we are not using it
        this.initParameters.put("auto-session-bridge", "0");
        // Forcing keep alive
        this.initParameters.put("keepalive", "1");
    }

    /*
     * (non-Javadoc)
     *
     * @see javax.servlet.ServletConfig#getServletName()
     */
    @Override
    public String getServletName()
    {
        return new String(servletName);
    }

    /*
     * (non-Javadoc)
     *
     * @see javax.servlet.ServletConfig#getServletContext()
     */
    @Override
    public ServletContext getServletContext()
    {
        return jsonRpcServletContext;
    }

    /*
     * (non-Javadoc)
     *
     * @see javax.servlet.ServletConfig#getInitParameter(java.lang.String)
     */
    @Override
    public String getInitParameter(String parameterName)
    {
        return (String) initParameters.get(parameterName);
    }

    /*
     * (non-Javadoc)
     *
     * @see javax.servlet.ServletConfig#getInitParameterNames()
     */
    @Override
    public Enumeration<String> getInitParameterNames()
    {
        //TO DO: code review here !
        //return (Enumeration<?>)initParameters.keySet();
        return IteratorHelper.toEnumeration( initParameters.keySet().iterator() );
    }
}
